SW-D7000U, 9CH. COLOR VIDEO MULTIPLEXER
68 JVC PROFESSIONAL, IMAGING PRODUCTS
incidental movement, such as trees which may move in the wind, highly reflective surfaces
like windows or stretches of water, and traffic or pedestrians in the background.
Selecting the false alarm rejection level: It is recommended that the false alarm rejection setting is
left on LOW. Before changing the setting to MEDIUM or HIGH to reduce false alarms, first check
that the sensitivity, target size and zones are set up correctly. Do not select a higher false alarm
rejection level unless it is necessary.
Target Size:
(This setup is only
used for intrusion detection.) The size of a target for motion detection (normally a
human being) will vary depending on the camera lens and the distance from the camera. In general,
if size discrimination is used during the detection of motion, motion detection will result in fewer false
alarms from small animals, movement of plants in the wind or reflections. ‘TARGET SIZE’ defines
the minimum size.
The
SW-D7000U
target size setting is related to the number of zones that a single target will fill. The
programmer can set the TARGET SIZE separately for each camera, between 1 and 256. The factory
default target size setting is 1. This means that all sizes of targets will result in motion detection if
the sensitivity is set up correctly.
Setting TARGET SIZE:
Estimate how many zones the target will normally fill based on the camera view, and then enter that
number as the target size.
Example:
If a human normally fills a 5 x 2 grid on a particular camera scene, which is 10 zones, then the target
size for that camera should be entered as 10.
Recommendation:
Set the target size to the lowest reasonable setting for the target and the camera scene, unless false
alarms from smaller targets are common. For more reliable intrusion detection, the target size should
preferably be set to
at least 2
.
Recommended LENS SELECTION for Intrusion Detection:
"
Select a lens so that a human will always fill 2 or more zones in the camera scene.
"
Select the lens and field of view so that the Target will normally remain in the field of view for
at least two seconds, at expected target speeds.
NOTE:
The sensitivity setting can affect the degree of detection within each zone, and must be
adjusted together with the target size for best performance.
Link to Alarm:
(This setup is only used for INTRUSION detection.) The
SW-D7000U’s
motion detection for each
camera can be used as a sensor to activate any of the alarm inputs. The
SW-D7000U
allows the
programmer to link the internal motion detection directly to the unit’s rear panel alarm to create a
motion based alarm sensor input. No physical wiring is needed to link to an alarm input, just the
menu entry.
If an
SW-D7000U
alarm input is activated by one of the
SW-D7000U’s
internal motion detector
channels, the unit will react in exactly the same way as for any other external sensor activating that
alarm input. The system does not differentiate between an input from another alarm sensor and the
input activated by the link from the internal motion detection.
